1948. Twenty-ninth Edition. 524 pages. No dust jacket. Blue cloth boards with lettering. Contains black and white illustrations and folded chart. Hinges are slightly cracked with exposed netting. Clean pages with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Pen markings to front free endpaper. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Lettering is darkened. Moderate sunning to spine and edges with crushing to spine ends. Minor splits to spine ends and corners causing cloth to be frayed. Book has a slight forward lean. Visible wear marks to boards.